Vulnerability-Lookup

CNVD-2026-21827

Vulnerability from cnvd - Published: 2026-05-20

Title

Apache Tomcat输入验证错误漏洞（CNVD-2026-21827）

Description

Apache Tomcat是一款开源Java Web应用服务器，用于运行Servlet和JSP应用。 Apache Tomcat存在输入验证错误漏洞。该漏洞产生的原因是HTTP请求解析路径中遗留的输入验证逻辑未被移除，导致异常请求数据可进入不应触发的处理分支。攻击者可利用该漏洞提交特制HTTP请求并影响服务器请求处理流程。

Severity

高

Patch Name

Apache Tomcat输入验证错误漏洞（CNVD-2026-21827）的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： http://www.openwall.com/lists/oss-security/2026/05/12/13

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-41293

Impacted products

Name
['Apache Tomcat >=8.5.0，<=8.5.100', 'Apache Tomcat >=9.0.0，<9.0.118', 'Apache Tomcat >=10.1.0，<10.1.55', 'Apache Tomcat >=11.0.0，<11.0.22', 'Apache Tomcat >=10.0.0，<=10.0.27']

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-41293",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-41293"
    }
  },
  "description": "Apache Tomcat\u662f\u4e00\u6b3e\u5f00\u6e90Java Web\u5e94\u7528\u670d\u52a1\u5668\uff0c\u7528\u4e8e\u8fd0\u884cServlet\u548cJSP\u5e94\u7528\u3002\n\nApache Tomcat\u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662fHTTP\u8bf7\u6c42\u89e3\u6790\u8def\u5f84\u4e2d\u9057\u7559\u7684\u8f93\u5165\u9a8c\u8bc1\u903b\u8f91\u672a\u88ab\u79fb\u9664\uff0c\u5bfc\u81f4\u5f02\u5e38\u8bf7\u6c42\u6570\u636e\u53ef\u8fdb\u5165\u4e0d\u5e94\u89e6\u53d1\u7684\u5904\u7406\u5206\u652f\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u63d0\u4ea4\u7279\u5236HTTP\u8bf7\u6c42\u5e76\u5f71\u54cd\u670d\u52a1\u5668\u8bf7\u6c42\u5904\u7406\u6d41\u7a0b\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttp://www.openwall.com/lists/oss-security/2026/05/12/13",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-21827",
  "openTime": "2026-05-20",
  "patchDescription": "Apache Tomcat\u662f\u4e00\u6b3e\u5f00\u6e90Java Web\u5e94\u7528\u670d\u52a1\u5668\uff0c\u7528\u4e8e\u8fd0\u884cServlet\u548cJSP\u5e94\u7528\u3002\r\n\r\nApache Tomcat\u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662fHTTP\u8bf7\u6c42\u89e3\u6790\u8def\u5f84\u4e2d\u9057\u7559\u7684\u8f93\u5165\u9a8c\u8bc1\u903b\u8f91\u672a\u88ab\u79fb\u9664\uff0c\u5bfc\u81f4\u5f02\u5e38\u8bf7\u6c42\u6570\u636e\u53ef\u8fdb\u5165\u4e0d\u5e94\u89e6\u53d1\u7684\u5904\u7406\u5206\u652f\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u63d0\u4ea4\u7279\u5236HTTP\u8bf7\u6c42\u5e76\u5f71\u54cd\u670d\u52a1\u5668\u8bf7\u6c42\u5904\u7406\u6d41\u7a0b\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Apache Tomcat\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2026-21827\uff09\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Apache Tomcat \u003e=8.5.0\uff0c\u003c=8.5.100",
      "Apache Tomcat \u003e=9.0.0\uff0c\u003c9.0.118",
      "Apache Tomcat \u003e=10.1.0\uff0c\u003c10.1.55",
      "Apache Tomcat \u003e=11.0.0\uff0c\u003c11.0.22",
      "Apache Tomcat \u003e=10.0.0\uff0c\u003c=10.0.27"
    ]
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-41293",
  "serverity": "\u9ad8",
  "submitTime": "2026-05-18",
  "title": "Apache Tomcat\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2026-21827\uff09"
}

CVE-2026-41293 (GCVE-0-2026-41293)

Vulnerability from cvelistv5 – Published: 2026-05-12 15:19 – Updated: 2026-05-14 19:54

Title

Apache Tomcat: HTTP/2 request headers not validated

Summary

Improper Input Validation vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 10.0.0-M1 through 10.0.27. Older, end of support versions may also be affected. Users are recommended to upgrade to version [FIXED_VERSION], which fixes the issue.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-20 - Improper Input Validation

Assigner

apache

References

2 references

URL	Tags
https://lists.apache.org/thread/qwg0q16z7xkb2qrr8…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Tomcat	Affected: 11.0.0-M1 , ≤ 11.0.21 (semver) Affected: 10.1.0-M1 , ≤ 10.1.54 (semver) Affected: 9.0.0.M1 , ≤ 9.0.117 (semver) Affected: 10.0.0-M1 , ≤ 10.0.27 (semver) Affected: 8.5.0 , ≤ 8.5.100 (semver)

Credits

Dawit Jeong (@dawitngoliath)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-05-12T17:40:57.407Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/05/12/13"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-41293",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-14T16:40:13.006509Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-14T19:54:07.534Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Apache Tomcat",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThanOrEqual": "11.0.21",
              "status": "affected",
              "version": "11.0.0-M1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.1.54",
              "status": "affected",
              "version": "10.1.0-M1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.0.117",
              "status": "affected",
              "version": "9.0.0.M1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.0.27",
              "status": "affected",
              "version": "10.0.0-M1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.5.100",
              "status": "affected",
              "version": "8.5.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Dawit Jeong (@dawitngoliath)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eImproper Input Validation vulnerability in Apache Tomcat.\u003c/p\u003e\u003cp\u003eThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 10.0.0-M1 through 10.0.27.\u003cbr\u003eOlder, end of support versions may also be affected.\u003c/p\u003e\u003cp\u003eUsers are recommended to upgrade to version [FIXED_VERSION], which fixes the issue.\u003c/p\u003e"
            }
          ],
          "value": "Improper Input Validation vulnerability in Apache Tomcat.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 10.0.0-M1 through 10.0.27.\nOlder, end of support versions may also be affected.\n\nUsers are recommended to upgrade to version [FIXED_VERSION], which fixes the issue."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "low"
            },
            "type": "Textual description of severity"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20 Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-12T15:19:35.179Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.apache.org/thread/qwg0q16z7xkb2qrr853wdll5531mvl1r"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Apache Tomcat: HTTP/2 request headers not validated",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2026-41293",
    "datePublished": "2026-05-12T15:19:35.179Z",
    "dateReserved": "2026-04-20T10:26:28.623Z",
    "dateUpdated": "2026-05-14T19:54:07.534Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CNVD-2026-21827

CVE-2026-41293 (GCVE-0-2026-41293)

Tags

Sightings

Nomenclature